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Parameter (VisionWorks)

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Seiya Shimizu edited this page Sep 23, 2019 · 2 revisions

visionworks

  • shrink_scale: Image size will be shrinked by this factor in image processing for accelerating calculation. Must be a power of 2.
  • correlation_windows_size: SAD correlation window width [pixels].
  • bt_clip_value: Truncation value (must be odd) for pre-filtering algorithm. It first computes x-derivative at each pixel and clips its value to [-bt_clip_value, bt_clip_value] interval.
  • ct_win_size: Specifies the census transform window size.
  • hc_win_size: Specifies the hamming cost window size.
  • min_disparity: Disparity to begin search at [pixels] (Must be zero or positive).
  • max_disparity: Disparity to finish search at [pixels] (Must be divisible by 4).
  • path_type: Scan line directions used during cost aggregation step. Can be selected from "Individual", "SCANLINE_CROSS" and "SCANLINE_ALL". 8 individual directional options above are effective only when "Individual" is selected.
  • FILTER_TOP_AREA: Extra flags for SGBM algorithm. Filter cost at top image area with low gradients.
  • PYRAMIDAL_STEREO: Extra flags for SGBM algorithm. Use pyramidal scheme: lower resolution imagery for nearby objects and the full resolution for far-away objects.
  • uniqueness_ratio: Filter out if best match does not sufficiently exceed the next-best match.
  • path_type: Scan line directions used during cost aggregation step.
  • P1: The first parameter controlling the disparity smoothness. See below.
  • P2: The second parameter controlling the disparity smoothness. The larger the values are, the smoother the disparity is. P1 is the penalty on the disparity change by plus or minus 1 between neighbor pixels. P2 is the penalty on the disparity change by more than 1 between neighbor pixels.
  • disp12MaxDiff: Maximum allowed difference (in integer pixel units) in the left-right disparity check, only available in SGBM.
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